Samuel "Harry" Miles, pictured in court Monday, told police he killed his neighbor because he believed she thought he was "white trash." (The Huntsville Times/Robin Conn)

HUNTSVILLE, Alabama -- Jurors deliberated for about two hours before convicting Samuel Miles of capital murder for the January 2009 slaying his neighbor.

Miles attorneys had admitted he had killed Linda Keller, 49, but argued he was mentally ill and should be found not guilty by reason of mental disease or defect and hospitalized.

When he shot Keller to death at her home on Fieldstone Court in January 2009, Miles called a 911 dispatcher and admitted to killing Keller because he perceived that by cleaning her car with a white cloth and white garbage bag, she was calling he and his family "white trash."